Light-emitting diode (LED) devices comprising nanocrystals

Abstract

The present invention provides light-emitting diode (LED) devices comprises compositions and containers of hermetically sealed luminescent nanocrystals. The present invention also provides displays comprising the LED devices. Suitably, the LED devices are white light LED devices.

What is claimed is: 
     
       1. A method comprising:
 dispersing luminescent nanocrystals in aminosilicone to form a first mixture; 
 introducing the first mixture into a container comprising a glass or plastic material; 
 adding a cross-linker to the first mixture in the container to form a second mixture; 
 curing the second mixture in the container; and 
 hermetically sealing the container. 
 
     
     
       2. The method of  claim 1 , wherein the dispersing further comprises dispersing the luminescent nanocrystals comprising CdSe or ZnS. 
     
     
       3. The method of  claim 1 , wherein the dispersing further comprises dispersing the luminescent nanocrystals comprising CdSe/ZnS, InP/ZnS, PbSe/PbS, CdSe/CdS, CdTe/CdS, or CdTe/ZnS. 
     
     
       4. The method of  claim 1 , wherein the introducing of the first mixture comprises drawing the first mixture into the container with a vacuum or suction mechanism. 
     
     
       5. The method of  claim 1 , wherein the container comprises a glass or plastic capillary. 
     
     
       6. The method of  claim 1 , wherein the introducing of the first mixture comprises drawing the first mixture into a glass or plastic capillary with a vacuum or suction mechanism. 
     
     
       7. The method of  claim 5 , further comprising providing the glass or plastic capillary having at least one dimension of about 100 μm to about 1 mm. 
     
     
       8. The method of  claim 1 , wherein the hermetically sealing of the container comprises heat sealing the container. 
     
     
       9. The method of  claim 1 , wherein the hermetically sealing of the container comprises adhesive bonding the container. 
     
     
       10. The method of  claim 1 , wherein the hermetically sealing of the container comprises sealing an end of the container with a filled epoxy or a liquid crystalline polymer. 
     
     
       11. The method of  claim 1 , wherein the introducing of the first mixture comprises applying a reduced pressure to an end of the container to draw the first mixture into the container. 
     
     
       12. The method of  claim 1 , further comprising optically coupling the hermetically sealed container to at least one LED device. 
     
     
       13. The method of  claim 1 , further comprising optically coupling the hermetically sealed container to at least two LED devices. 
     
     
       14. The method of  claim 13 , wherein the hermetically sealed container is spaced apart from the at least two LED devices. 
     
     
       15. The method of  claim 1 , wherein the luminescent nanocrystals emit green light or red light.